new matrix features, fixes

- no alerts more -> conole.log
- most methods return null, if a error occurs
- addRowToRow and ColToCol working no correct
- doGaus works correctly
- doGausWithPivot works correctly but doesn’t work with permutations.
the order might changed (Patch coming)
- calcInvers calculates the inverse matrix (matrix need to be symmetric)
- calcAdjunct calculates the adjunct matrix
- createCopy works now correct